7Energy Work Power EfficiencyHard1 mark
The total mass of a cyclist and his bicycle is 80 kg.
The cyclist starts from rest and rides down a hill without pedalling.
The vertical height of the hill is 50 m.
At the bottom of the hill, the speed of the cyclist is 20 m / s.
How much energy is wasted as the cyclist rides from the top of the hill to the bottom of the hill?